Malicious PDF — malware analysis report

Static analysis result for SHA-256 63772f3151c80cef…

MALICIOUS

PDF

76.2 KB Created: 2021-09-03 20:04:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d902890baeeb47b362f876460ea09ebe SHA-1: 5eacb2baabc86ce85e6c6c595fae7e108c75ef36 SHA-256: 63772f3151c80cefd43490beccf0136f3700be2f3e1ce96c48b66552bbcd98f3
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is a PDF identified by ClamAV as a phishing trojan. Static analysis reveals it functions as a link farm, containing numerous URLs pointing to compromised WordPress uploads and disposable hosting. These links are likely intended to lure users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4678

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://recapress.com/ckfinder/userfiles/files/51411485370.pdf In PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1c5fc0039b---16556138034.pdfIn PDF document text
    • http://monkey-do.net/userfiles/file/83329050133.pdfIn PDF document text
    • https://namratalakhotia.com/userfiles/files/bitutomuvorunodibixubuz.pdfIn PDF document text
    • https://betentour.com/sites/default/files/file/79707003787.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/58729313259.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/81093361558.pdfIn PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/0d218b2ab6cb2ad58315633ffd10cbd2/2432305986.pdfIn PDF document text
    • http://mtlebanon62.com/clients/5/5e/5ee551a8be14a26d7d76bc5e90dd1372/File/27669983090.pdfIn PDF document text
    • http://moyamoya.center/images/hand_uploaded/files/56331135836.pdfIn PDF document text
    • http://www.petercar0937494634.com/upload/img/files/59460309060.pdfIn PDF document text
    • http://hanabi-la.com/uploads/files/vubexakujinimow.pdfIn PDF document text
    • http://kanchanaspa.com/ckfinder/userfiles/files/rezezefiwe.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/a7573aaae8636739823a89dadf821a70/35487720525.pdfIn PDF document text
    • http://lhsclassof1971.com/clients/74120/File/labubogisefubetusunafog.pdfIn PDF document text
    • http://taiwan-casters.com/userfiles/file/wenedubigodowavipuna.pdfIn PDF document text
    • https://network-italia.com/file/81194878441.pdfIn PDF document text
    • https://albawadiroad.com/userfiles/files/xisapazitunususeluju.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/vairg3j1rcr9re7ugd83ncnfek/72116517794.pdfIn PDF document text
    • http://www.multigacos.com/admin/uploaded/fck/file/tujan.pdfIn PDF document text
    • https://preprodpcb.com/userfiles/files/78596267178.pdfIn PDF document text
    • http://retrofotr.cz/files/file/pezateruxagutozavatagote.pdfIn PDF document text
    • http://dotbamboo.com/file_media/file_image/file/medamubeminezaroz.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609a680cdb42d---wizapoxitavev.pdfIn PDF document text
    • http://writtenmail.com/upload_images/file/24854453766.pdfIn PDF document text
    • http://e-photo.lv/ckfinder/userfiles/files/votidovewil.pdfIn PDF document text
    • http://galgalesh.com/userfiles/file/69488825727.pdfIn PDF document text
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/zasiwup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=le+transport+maritime+en+afrique+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F2 20876 bytes
SHA-256: 03d324901bb00ded1559b886950eacd7bbf8ea63843cfec0132a7bb95737208f

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